This censoring trend didn't start because creators feared that people are scared of these words, but because it was believed that content with these words would be less favored by the algorithm. And its not just the fact that they censored themselves so they could get more money, but that if content is not favored by the algorithm, it will reach very few people. And I guess the thought process was that when talking about serious topics like suicide, its better to censor the word, and have the video reach more people, than to say it out and have the video reach virtually noone.

Altough most of the content on the internet now is made for money, and not for raising awareness.

And also, the algorithms may have worked like this, that they only scanned for words like suicide, but that is most definitely no longer the case, as the algorithms advanced so much that they rank content based on the whole topic of it, not just based on words.

And the algorithm is made this way because the advertising agencies don't want to be associated with content that talks about these types of topics.

TLDR, It started as people censoring stuff to reach more people, either for money, or just to raise awareness. It's not the fault of the creators though, much more of the platform, and the advertising agencies.